we're a few days away from the first debate between barack obama and mitt romney. both candidates are looking for a tense face-to-face showdown and we get the latest -- latest from brian mooar. >> after going to church, mitt romney hunkered down for the first dress rehearsal of the presidential debate. it's an important opportunity to reboot his campaign and reintroduce himself to the american people. >> i think debates matter psychologically to the country and are the most viewed single event in the campaign and i think it's always a burden on the challenger, it isn't about romney but about the challenger. >> and about both campaigns looking for a knockout punch. >> come thursday morning the narrative of this race will change. >> the narrative now is president obama has a lead in all nine of the key battleground states and romney is trying to get back on message. >> we've had some missteps but at the end of the day, the choice is really clear, and we're giving people a very clear choice. >> president obama headed to nevada to polish his performance before the big